Improvement in machines for turning wooden axles



M. MCMAHON-. Improvement in Machines for Turning Wooden Axles. No'. Patentedjuly 16,1872.-

I27. F H MIV/ ZZZZI A A law/ w J W/TWESSEJ UNITED STATES PATENT Orrron MICHAEL MOMAHON, OF ST. PETER, MINNESOTA.

Specification forming part of Letters Patent No. 129,486, dated July 16, 1872.

Specification describin g a n ew and Improved Machine for Turning Wood Wagon-Axles, invented by MICHAEL MoMAHoN, of St. Peter, in the county of Nicollet and State of Minnesota.

My invention consists of certain combinations and arrangements of devices for rotating a cutter around the axle, which is held in a clamp, and feeding said cutter along the axle lengthwise in such manner as to turn the bearing upon any taper; also, to turn a part upon one taper and a part upon another, and one part in oval form; also, to turn it for the right gather and pitch, all as hereinafter described.

Figure 1 is a longitudinal sectional elevation of my improved machine taken on the line a: a: of Fig. 2. Fig. 2 is an end elevation. Fig. 3 is a transverse section on the line y y of Fig. 1. Fig. 4 is a section of one of the centers, which is also the feed-screw of the tool, and elevation of the clamp-nut, by which the tool-bar is worked by said feed-screw. Fig. 5 is a plan of part of the tool-carrying bar. Fig. 6 is a section of part of said tool-carrying bar; and Fig. 7 is a section of the center and an elevation of one of the disks for actuating the tool.

Similar letters of reference indicate correspondin parts.

e axle of wood for which the machine is esigned to turn the endsB thereof, as shown, for receiving the skeins. 'Said axle is to be supported near about the center in a clampingframe', 0 D E F, in which it is bound by a clamp-sc'rew, G, and at the end to be turned it is supportedby the fixed center H. This clampin g-frame is adjustable vertically for adjusting the axle so as to have the bearing B formed on the requisite pitch, and the axle is adj ustable laterally in said clamping-frame to regulate the gather. The bar E of this clamping-frame is provided with bolts I passing through the slotted posts K, and having nuts on the outsides of said posts to hold the frame at any given or required height by screwing up said nuts. This bar and the lower bar 0 of said frame work in grooves of the inner sides of said posts. The tool L is mounted in a long bar, M, which passes through disksN O mounted in standards P, with large circular holes in which the said disks fit at their peripheries to be supported thereat and on which they turn,

being confined in said supports by a flange, Q, on one side, and detachable plates R on the other. There are also radial adjustable hearing pieces S with binding-screws T confined with these supports and disks in such manner as to take up the slack caused by wear. These disks are mounted so that the portion B of the axle to be turned will be held between them, and they are connected by rods U in such manner as to form a kind of reel or skeleton-drum, and on these rods, near about the middle, is a toothed wheel, V, with a large central opening through its center, through which the axle passes, and the tool-bar M passes through a radial slot W in this wheel opening into the central opening of it. through radial slots XY in the aforesaid disks. The slot X opens into a large central opening in wheel N, through which the axle passes; but the other disk has only a small central hole for the center H. There is a spring, Z, combined with disk N and tool-bar M in such manner as to constantly press it and the tool toward the axle acting onsaid bar in the slot X. On the other disk 0 there is an adjustable notched plate, a, with clamping-bolts b fixed so as to be shifted toward and from the axis, and hold the bar and its too] down to its work. This tool-carryin g bar is connected to the twopart hinged clamp-nut d beyond the disk 0 by the end 0 arranged in the long slot f and the pins g in slots h in such manner as to allow said bar to be adjusted toward and from the axle; also, so that said bar can be moved lengthwise by the nut. This nut is fitted to clamp on the screw-threaded center H, and provided with rastenings ih to lock it thereto. It is screw-threaded in the parts fitting said screw, so that by being turned around the said screw it will be moved lengthwise thereof, and thereby feed the tool along the part of the axle to be turned. It is turned around the screwcenter H by the tool-bar M, and this tool-bar and the disks in which it is mounted are turned by the toothed wheel V, which is turned by a driving-wheel, V,worked byhand or any competent power. There is an adjustable notched plate, I, on wheel V, similar to the one on disk 0, by which the tool-bar is adjusted to form the taper of that part of the journal extending from the point to the shoulder m, and from this point to the shoulder a the taper is regulated Said bar also passesv by the wheel V and spring Z. The tool-bar swings on its bearings in wheel V. Said wheel is adjustable along the rods U, and the platform pfor holding the driving-wheelV',which is also adjustable along the ways q as the wheel is shifted for adjusting to cut difl'erent tapers between said shoulders. By moving this wheel V toward disk N the angle of the taper will be increased, and by moving it the other way it will be diminished, as will be clearly understood by inspection of the drawing. This adjustment is only made when different tapers are required between the shoulders. The oval form for the upper part of the bearing at it, between the shoulders m and n, is produced by the end 8 of the tool-bar comin g into the cam-groove tin the lower part of its revolution, which groove is so shaped as to move the tool from the axis of the journal through the first half of said part of the revolution and toward it in the other half, thus forming a kind of semi-elliptical enlargement, n. This cam-groove t is a space between two vertically-adj ustable plates, u and '0, which are so supported in the frame that they can be shifted up or down to vary the amount of the said semi-elliptical enlargement n. The tool L is adjusted radially to the journal-bearing for taking successive cuts by screwing in its holding-bar, and it is held against turning by a notched sliding plate, 10, in the notch of which the squared part as of said tool rests when said plate isadjusted for holding said tool, and is secured by its thumb-nut z. Said tool is adjusted at the beginning of each cut. The center H is adjustable forward and backward in the direction of its length for axles of different sizes, and is held by a pin, a, for which it has several holes, b. The point 0 of this center H is detachable to allow of using pins of different sizes adapted to the holes for axles of different sizes, which holes, being for the skein-bolts, vary in size according to the sizes of the axles. When the tool has completed one cut the clamp-nut is opened by disconnecting the fasteningsz' k and moved back to the place of beginning for another cut.

Having thus described my invention, I claim as new, and desire to secure by Letters Patcut- 1. The combination of the adjustable plates forming the cam-groove t with the tool-bar, substantially as specified.

2. The tool L arranged adj ustably in the stock, as described, and provided with the holding plate to and thumb-screw y, substantially as specified.

3. The combination of the radially-adjustable bearings S with the disks N O and the supports P, substantially as specified.

MICHAEL MGMAHON.

Witnesses:

GUsrAF J OHNSON, OLAVES MoRK. 

